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Introduction |
| If your laptop battery is inaccurately reporting its capacity or is older, it may be possible to recalibrate the battery to extend its life. | | | For help understanding what calibration is, why it’s important, and how to calibrate batteries in other types of devices, check out the [[Battery Calibration|Battery Calibration Wiki.]] | | '''''Important: Battery recalibration willdoes not save a worn out batterybatteries.''''' This will correct the reported capacity and may extend it’s life for a short period of timeruntime temporarily, but will not recover the pack. '''''If there are any improvements, these are typically short-term.''''' | | | === ++Guide notes++ === | | * '''''If your battery exceeds 30-40 °C (86-104 °F), REPLACE THE BATTERY!''''' | * '''''If your packbattery is older, consider a discharge to ~10% discharge. These batteries may be damaged withfrom a full discharge.''''' | * '''''In most cases, you will see a capacity decrease. This is good since the capacity reported by the BMS is accurate, not bad.''''' | | * '''''Avoid using your laptop while it is charging. This may affect calibration accuracy.''''' | * If your laptop does not allow you to use it when the battery drops to a certain percentage, you will need to use a workaround. This varies based on the BIOS type (UEFI or Legacy)'''''Workarounds for UEFI/Legacy BIOSes are provided.''''' | | === ++How to recalibrate the battery++ === | | * Charge the laptop to 100%. | | * Use the laptop until it reports a 0% capacity and shuts down | ** See '''''BIOS lockouts (known)''''' for bypasses if you use an HP orand Lenovo laptoplaptops. | * Immediately recharge the battery to start recalibrationrecalibrate. Do not use the laptop. | | === ++BIOS lockouts (known)++ === | * '''''HP laptops have a 15% BIOS lockout and will need to be bypassed''''' to do a full discharge. Immediately charge the battery once the battery reaches 0% and the laptop shuts off.
** '''''This always happens with HP laptops unless it is bypassed.'''''
* Some Lenovo laptops have a ~7% critical low capacity errorlockout (0190).
** '''''This only comes upoccurs if the laptop is turnedshuts off before the battery reached 0% and diesearly.''''' |
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